Intangible Assets

12 Months Ended

Dec. 28, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

7. Intangible Assets

The components of our purchased intangible assets as of December 28, 2019 are as follows (in thousands):

	Useful Lives	FY 2019 Annual Amortization		Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Useful Lives Remaining
Customer relations	15 Years	$	16	$	240	$	156	$	84	5.25 Years
Patents	Varies		—		600		600		—	Varies
		$	16	$	840	$	756	$	84

The components of our purchased intangible assets as of December 29, 2018 are as follows (in thousands):

	Useful Lives	FY 2018 Annual Amortization		Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Useful Lives Remaining
Customer relations	15 Years	$	16	$	240	$	140	$	100	6.25 Years
Patents	Varies		—		600		600		—	Varies
		$	16	$	840	$	740	$	100

Aggregate amortization expense for each of the fiscal years 2019 and 2018 was $16 thousand. The amortization of customer relations was charged to sales and marketing expense.

Estimated future amortization expense for purchased intangible assets is as follows (in thousands):

Fiscal Year:
2020	$	16
2021		16
2022		16
2023		16
2024		16
Thereafter		4
Total	$	84